PATENT COSTS (Tables)

3 Months Ended

Mar. 31, 2018

PATENT COSTS [Abstract]

Net Patent Costs

For each period presented below, net patent costs consisted of:

	March 31, 2018			December 31, 2017
Patents		969,614		$	925,016
Accumulated amortization		(543,829	)		(527,023	)
	$	425,785		$	397,993

Estimated Aggregate Future Amortization Expense

The estimated aggregate amortization expense for the remaining nine months of 2018 and each of the years below is approximately as follows:

April 1, 2018 - December 31, 2018	$	51,000
2019		66,200
2020		50,400
2021		34,500
2022		34,500
Thereafter		189,185